请求内部转发与重定向区别

1. @Override
2. protectedvoid service(HttpServletRequest req,HttpServletResponse resp)
3. throws ServletException,IOException{
4. //设置响应编码格式
5. resp.setCharacterEncoding("utf-8");
6. resp.setContentType("text/html;charset=utf-8");
7. //设置请求字符编码格式
8. req.setCharacterEncoding("utf-8");
9. //请求转发(获取用户数据)：
10. System.out.println(req.getParameter("uname"));
11. System.out.println(req.getParameter("pwd"));
12. //开始请求转发
13. req.setAttribute("405","听说支付宝要收费了，赶紧给我转账");
14. req.getRequestDispatcher("tr.action").forward(req, resp);
15. //开始重定向
16. resp.sendRedirect("http://www.baidu.com");
17. return;
18. }

1. @Override
2. protectedvoid service(HttpServletRequest req,HttpServletResponse resp)
3. throws ServletException,IOException{
4. //获取用户数据
5. System.out.println(req.getParameter("uname")+"-----tr.action");
6. System.out.println(req.getParameter("pwd")+"-----tr.action");
7. System.out.println(req.getAttribute("405"));
8. resp.getWriter().write("哈哈");
9. }

             

 

请求内部转发和重定向图解

总结：